Valve for percussive tools.



L. C. BAYLES.

VALVE FR PERGUSSIVB TOOLS.

APPLIGAToN FILED MAY 31, 1912.

EatentedD/Iar. 18, 1913.

mms/vm m Q. @mgm A 'roR/vfy annular chandler 1l.

ssrn retrasa' ersten.

LEWIS C. BAYLESK, OF EASTNY'., PNNSYLVANIA, ASSIGNOR TO INGRSOLi-RAND.

COMPANY, F NEW YORK, Y., A CORPORATION 0F NEW JERSEY.

VALVE FOR PERCUSSVE TOOLS.

Specification et' Letters Patent.

Patented Mar. 18, T1913.

Application lefl May 31, 1912. Serial No. 700,639.

t.- lowing the piston to move inside ot' it`r the ohject. of such construction being that the length of the cylinder can he materially de creased without the necessity of a cuinhen some valve chest on the outside of the cylinder.

A further object is to produce a valve of this type in which all pressures are perfectly halanced` friction being thus reduced toa minimum.

TWith these and other ohyiects in view which will further,appear l have devised a valve a practical enihodin'icnt ot' which is shown in the accompairving drawings in which,

li`igrure 1 is a plan view of the tool Fig. Q is a longitudinal section through the tool talen on the line li-'ll of' l"i Il Fig'. f5 a transverse set-tion through the valve taken on the line TIL-lll of Fig'. Q aud Fig'. L'lis a section similar to Figiv l showing` a modified forni ot the valve.

ln the drawings, the tool as shown is a riveting tool which letnnprises a cylinder liu which reciprocate-s a piston 2 which actuales hy its impact the rivet set ln the -forin sho-wn in Fig'. 3 the valve consists of a riug r 4 provided with two internally projecting' taper wings and t3. This is adapted to oscillate ahout a cylindrical valve seat T which is provided with diametrieally opposite slots S and 9 into which the wings 5 and (l extend and in which the wings 3 and (i may have a l'inited roscillatory inove` nient. 'lhese slots n and 9 are in direct coni` inunication with the, tool inlet from the From the faces of the slots S and 9 elongated inletl ports 1Q and l?) lead hy ports l/l and i3 to opposite sides of. the hack end o'l'v the cylinder'. From the op posite faces of the Aslots 8 and 9 inlet pas sages 1G and 1T lead to opposite ports 18 1n the front, end of the cylinder. Tov allovvI the fluid to exhaust from the cylinder two sets of exhaust passages are provided, passages 19 and Q0 leading from the hack end of the cylinder and passages Q1 and 22 leading from the front end of the cylinder.l These exhaust passages are so placed las to balance each other and to register alternately With ports Q3, Q4, .and 2G in the valve ring 4;, which ports lead to the atmosphere. The handle 2T of the tool is provided with a evlindrical flange 2S which protects th valve ring l from external Contact.

in operation, supposing the valve to be in the position in Fig. l3, live fluid will enter the tool through the inlet 10 and annular chamber 11 and pass through the slots 8 and E), and ports l2, 1?), lst and 15 into the rear end ot the cylinder driving' the piston forward, the air in the forward endet the cylinder exhausting through passages Q1 and 22 and ports Q5 and Q6 to the atmosphere. lfh'en the piston covers the opening' of passage 22. as shown in l"ig.2, the further forward movement oit the piston will create a pressure iu the forward end of the cylinder which will he transmitted hy ports 18 andy passages 1G and 17 to the wings 5 and G on the ,'alve throwing the wings 5 and 6 to the opposite side of the valve slots S and 9. This will allow live. fluid pressure to enter the forward end of the cylinder through passages 1G and 1T and ports 18 driving' the piston hachY 'ard the valve being again thrown oy compression generated in the rear end of' Athe cylinder after the piston has passed the openings of passages 19 and 20.

ln Fig'. lila slightly modified form ofthe valve is shofvn in which the .wings 5 and 6 instead of being-integral with the valve ring' -l have cylindrical hearing portions 29 and 33() which are seated in the valvechest 7 while the other ends of the Wing' project `into `grooves 31 and 32 in the valve ring 4 thus communicating their motion to the valve ring.

Each construction results in a valve which is perfeetlyhalanced as to opposing fluid pressures on the valve ring l which conse quently ni'oves easily and without friction.

it, is to be understood that the presentshowingg' and description discloses only certain specified modifications of my invention and other forms and modifications are in-Y ifluclecl in the spirit and scope oil? ll'ie ini/eik lian as Qxprcsaml in lh@ (.laimsu what li claim is:

l?. ln a permissive mul, a cylinder, ils pis lou, au anuulail v; li'e Seal', an annular 'alve Ying* on said valve :wall5 Wings 1001' inuving sairl n li'c ying, c ylinflol' inlet pasaagea cunliollil hy Said Wings and, cylinilm exhaust. p'alsages controlled h3' Said annular valve ruig.

.ln a ieicusii'e mol, a, Oyliiillci3 its pis lun. an aunulair Yali': gaat, an annulaivalwy Ting:` fai' mm Aiig saiil Yalvu ring, aufl Qi'euljf :ei'iawml lluu'cawfiuml, ujf lullin' inlet passages cmiliallml hy said wings auil l'mlaucml ylmhi' Qxliausl' pasa-agus conliwallcll hy Said annular valve ring,

3. ln a pcicusivc tool, a C Ylinrlm; a pis lian, an anuulai' vulva -ca; suimiuuling said ':vlin(l fi, an annular Valve Ping' 0n said Valw Seal, Wingga4 im' ruining- Said valve Ping? anfl fjflindeif inlvl` passa@ cuiili'ullcil by Saifl finga #aid f-'vlinllei inlli passages Serving' lo Cnni'j' luifl pressure l0 oscillale Saiffl wings.

il. lin a pci-cussive loolj a Cylinder, ils nis lou, an annulai' valve seal: having; slol's therein, a 'alii/s ring rotatably saaleil on said nn Said `valve Swat, a Iiluialily of Wings annular Saat and having' polla lim'aiin eilimiliausti passages leading` Y[min muh @inl of ,1,3 the cylinflmf having openings su placed as to alternately regisl'isi' willi the, paris in Said valve i'iuggj`r wings in said slot@ engaging; Said valve ring' and pusiionml tu nscillale 00 lwaou thix faces of said ,sluts :unil inlolipoils .30

in lhar 'faf'QS u'f said l lul's leading l0 th@ ends al lh@ Cylinder, and sci'viug' 1;() iuliufluv lluill 'la lili@ gvlilnflvi, and leafl fluiil lo said wings in Oscillalu The ysami). 1y 'l-C VIS C. l'Yl'S. i

ll itnessa z 1 E. S., Aixam, lll. lunufini. 

